:root {
  --bg: #0f172a;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --surface-3: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --border: #cbd5e1;
  --primary: #4f46e5;
  --primary-600: #4338ca;
  --primary-050: #eef2ff;
  --success: #16a34a;
  --success-050: #f0fdf4;
  --danger: #dc2626;
  --danger-050: #fef2f2;
  --warning: #d97706;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--surface-2);
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.4em; }
p { line-height: 1.5; }

.container { max-width: 1080px; margin: 0 auto; padding: 20px; }
.container-narrow { max-width: 560px; margin: 0 auto; padding: 20px; }

/* ---- App bar ---- */
.appbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.appbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); }
.brand span { color: var(--primary); }
.nav { display: flex; gap: 6px; margin-left: auto; }
.nav a {
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
.nav a.active, .nav a:hover { background: var(--primary-050); color: var(--primary-600); text-decoration: none; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 16px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 11px;
  border: 1px solid transparent;
  background: var(--surface-3);
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
  font-family: inherit;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-600); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 9px; }
.btn-lg { padding: 15px 22px; font-size: 17px; border-radius: 13px; }
.btn-block { width: 100%; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---- Forms ---- */
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.field { margin-bottom: 16px; }
input[type="text"], input[type="number"], textarea, select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-050);
}
.hint { color: var(--muted); font-size: 13px; margin-top: 4px; }

/* ---- Badges / misc ---- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-poll { background: #e0e7ff; color: #3730a3; }
.badge-wordcloud { background: #dcfce7; color: #166534; }
.badge-trivia { background: #fef3c7; color: #92400e; }
.badge-live { background: var(--danger); color: #fff; }
.muted { color: var(--muted); }
.row { display: flex; align-items: center; gap: 12px; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.stack { display: flex; flex-direction: column; gap: 8px; }
.spacer { flex: 1; }
.pill {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-weight: 600;
  font-size: 14px;
}

/* ---- Toast ---- */
#toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}
.toast {
  background: #111827;
  color: #fff;
  padding: 11px 18px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: var(--shadow);
  animation: toastin 0.15s ease-out;
}
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }
@keyframes toastin { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; } }

/* ---- Poll / trivia result bars ---- */
.result-bar {
  position: relative;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 10px;
}
.result-bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--primary-050);
  border-right: 2px solid var(--primary);
  transition: width 0.4s ease;
}
.result-bar.correct .result-bar-fill { background: var(--success-050); border-right-color: var(--success); }
.result-bar.incorrect .result-bar-fill { background: var(--danger-050); border-right-color: var(--danger); }
.result-bar-content {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  font-weight: 600;
}
.result-bar-count { color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---- Word cloud ---- */
.wordcloud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 16px;
  padding: 20px;
  min-height: 160px;
}
.wordcloud span {
  line-height: 1.1;
  font-weight: 700;
  transition: font-size 0.3s;
}

/* ---- Leaderboard ---- */
.leaderboard { list-style: none; margin: 0; padding: 0; }
.leaderboard li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--surface-2);
  margin-bottom: 8px;
}
.leaderboard .rank {
  font-weight: 800;
  width: 28px;
  text-align: center;
  color: var(--muted);
}
.leaderboard li:nth-child(1) .rank { color: #ca8a04; }
.leaderboard .lb-name { font-weight: 600; flex: 1; }
.leaderboard .lb-score { font-weight: 800; font-variant-numeric: tabular-nums; }

/* ---- Host layout ---- */
.host-grid { display: grid; grid-template-columns: 1fr 320px; gap: 16px; align-items: start; }
@media (max-width: 900px) { .host-grid { grid-template-columns: 1fr; } }

.session-code {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
}
.qr-box { text-align: center; }
.qr-box img { width: 180px; height: 180px; border-radius: 12px; border: 1px solid var(--border); background:#fff; }

.stat { text-align: center; padding: 12px; }
.stat .num { font-size: 30px; font-weight: 800; }
.stat .lbl { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }

.agenda-strip { display: flex; flex-direction: column; gap: 8px; }
.agenda-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
}
.agenda-item.current { border-color: var(--primary); background: var(--primary-050); }
.agenda-item.done { opacity: 0.55; }
.agenda-num { font-weight: 800; color: var(--muted); width: 22px; }

/* ---- Participant ---- */
.participant-shell { max-width: 560px; margin: 0 auto; padding: 16px; }
.option-btn {
  width: 100%;
  text-align: left;
  padding: 16px;
  font-size: 16px;
  margin-bottom: 10px;
  border: 2px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  font-family: inherit;
  color: var(--text);
}
.option-btn:hover:not(:disabled) { border-color: var(--primary); }
.option-btn.selected { border-color: var(--primary); background: var(--primary-050); }
.option-btn.correct { border-color: var(--success); background: var(--success-050); }
.option-btn.incorrect { border-color: var(--danger); background: var(--danger-050); }
.option-btn:disabled { cursor: default; }

.countdown {
  font-size: 44px; font-weight: 800; text-align: center; font-variant-numeric: tabular-nums;
}
.countdown.low { color: var(--danger); }

.big-status { text-align: center; padding: 40px 20px; }
.big-status .emoji { font-size: 56px; }

.center { text-align: center; }
.mt { margin-top: 16px; }
.mb { margin-bottom: 16px; }
.hidden { display: none !important; }

/* order / list controls */
.ord-btn { padding: 4px 9px; font-size: 13px; }

/* small screens */
@media (max-width: 560px) {
  .session-code { font-size: 32px; }
  .appbar-inner { padding: 10px 14px; gap: 10px; }
  .nav a { padding: 6px 10px; }
}